IP30 vs IP18
Head-to-head comparison of two IEC 60529 ingress protection ratings.
IP30 and IP18 are both IEC 60529 ingress protection codes, but they differ in solid-object protection (level 3 vs 1) and liquid protection (level 0 vs 8). IP30 is rated for > 2.5 mm — tool / wire and no protection, while IP18 provides > 50 mm — back of hand and continuous immersion (manufacturer-specified).
IP30 protects against tools and 2.5 mm solid objects but offers no water protection. A basic indoor rating for equipment in dry, low-dust environments where only tool-access protection is required.
The IP18 classification guarantees protection against solid objects larger than 50 mm and protection against the effects of continuous immersion in water under conditions specified by the manufacturer.. It is an IEC 60529 ingress protection code combining first-digit (solid) level 1 with second-digit (liquid) level 8.
Detailed comparison
The stronger rating on each row is highlighted in emerald.
Solid protection (first digit)
IP30
3 — > 2.5 mm — Tool / Wire
IP18
1 — > 50 mm — Back of Hand
Liquid protection (second digit)
IP30
0 — No Protection
IP18
8 — Continuous Immersion (manufacturer-specified)
Dust-tight
IP30
No
IP18
No
Water-jet resistant
IP30
No
IP18
Yes
Submersible
IP30
No
IP18
Yes
Outdoor suitable
IP30
No
IP18
Yes
The exact difference (IP30 vs IP18)
Solid protection
IP30
Level 3 — > 2.5 mm — Tool / Wire
IP18
Level 1 — > 50 mm — Back of Hand
IP30 provides "> 2.5 mm — Tool / Wire" (level 3), while IP18 provides "> 50 mm — Back of Hand" (level 1). IP30 is 2 levels higher.
Liquid protection
IP30
Level 0 — No Protection
IP18
Level 8 — Continuous Immersion (manufacturer-specified)
IP30 provides "No Protection" (level 0), while IP18 provides "Continuous Immersion (manufacturer-specified)" (level 8). IP18 is 8 levels higher.
NEMA equivalents
No direct NEMA equivalent.
No direct NEMA equivalent.
Recommendation
IP18 offers higher overall protection than IP30. Choose IP18 for harsher environments; IP30 may suffice for milder conditions and can be more cost-effective.